Advanced Material On TECHnology - AMOTECH

Transcription

1 Advanced Material On TECHnology - AMOTECH

2 CONTENTS PRODUCTS OVERVIEW 1 Compact Array (Space Saved) / AVSC F Series (4_Element) 2 Compact Array (Space Saved) / AVSC E Series (8_Element) 3 General Array / AVNC Series (2_Element) 4 General Array / AVNC Series (4_Element) 5 R-C Type EMI-ESD Filter / AVRC Series 6 Feed Thru Type EMI-ESD Filter / AVFC Series 8 High Power / AVL Series 10 Low Capacitance / AVLC Series 12 Terminology 13 Selection Guidelines & Application Field 14 Tape and Reel Specification & 15 Soldering Recommendation Transient Suppressors Applications 16 Typical Circuits Requiring Protection

3 PRODUCTS OVERVIEW AMECS Transient Suppressors are ZnO based devices designed for protection of low and medium voltage electronic circuits against electrostatic discharge and voltage or current transient surges. They have nonlinear voltage-current characteristics similar to back-to-back zener diodes and their multilayer structure provide many advantages comparing with zener diodes. Their breakdown voltage can range from 4V to 470V, surge current from 30A to 400A, capacitance value from 0.8 to 7.5 and their size from 0402 to AMECS Transient Suppressors cover different application fields, such as : 1. ICs and low voltage electronic circuits protection 2. Automotive electronics protection 3. Telecommunication Protective device that has been used for protection of ICs and low voltage electronic circuits for years is Zener diode. AMECS Transient Suppressors are a new SMD protective device, which present real and serious competition to Zener diode in numerous aspects: Symmetrical I-V characteristics Fastest response time (< 1ns) Variable capacitance values Low leakage current High surge current capability EMI / RFI attenuation characteristics High surge energy capability Good energy dissipation capability High reliability Good temperature stability Small size SMD compatibility In the field of automotive electronics and telecommunications AMECS Transient Suppressors compete with standard disc varistors. Their advantages are : Low clamping voltage Fast response time shorter than 5ns Variable capacitance values Low leakage current High current capability of the unit volume High energy capability of the unit volume Good energy dissipation capability Maximum operating Temp. up to +125 Good temperature stability High reliability Small size SMD compatibility Absolute Maximum Ratings Value Units Transients : Peak Single Pulse Surge 8/20 Waveform (Imax) 20 to 250 A Single Pulse Surge Energy, 10/1000 Waveform (Wmax) 0.05 to 2.5 J Operating Ambient Temperature -55 to +125 Storage Temperature Range -55 to +150 Threshold Temperature Coefficient < %/ Response Time < 1 ns Climatic Category 55/125/56 1

4 Compact Array (Space Saved) AVSC -F Series (4_element) Features Application AVSC SERIES Four elements in one chip 0405 sizes World smallest size Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements ESD Protection > 30KV Low capacitance for high frequency data line protection Fast response time < 1ns LCD Module Mobile Phone/PDAs MP3 Player Digital Camera ESD Protection for sensitive IC I/O Port, Keypad for portable devices Wireless Handsets Lap top computer Desk top computer Ordering information AVSC 5 S 04 F 025 Compact Array Varistor Maximum Continuous Working - Vdc Vn Tolerance : K = 10%, L = 15%, M = 20%, S = Special order Configuration : F = 4 element Chip Size : 04 = 0405 Typical 1MHz : 025 = 25pF Specifications Type Symbol Units Test Condition AVSC 18S 04 F AVSC 5S 04 F AVSC 5S 04 F Dimensions (unit : mm) Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 0.5Vrms@ 1MHz max Typ. 1 Resistance* R Mega Ohms (min.) 3V DC Equivalent Circuit Diagram Pad layout Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering. 2

5 Compact Array (Space Saved) AVSC -E Series (8_element) Features Application Eight elements in one chip 0508 sizes World smallest size Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements ESD Protection > 30KV Low capacitance for high frequency data line protection Fast response time < 1ns LCD Module Mobile Phone/PDAs MP3 Player Digital Camera ESD Protection for sensitive IC I/O Port, Keypad for portable devices Wireless Handsets Lap top computer Desk top computer AVSC SERIES Ordering information AVSC 5 S 05 E 025 Compact Array Varistor Maximum Continuous Working - Vdc Vn Tolerance : K = 10%, L = 15%, M = 20%, S = Special order Configuration : E= 8 element Chip Size : 05 = 0508 Typical 1MHz : 025 = 25pF Specifications Type Symbol Units AVSC Test E Series Condition AVSC 18S 05 E AVSC 5S 05 E AVSC 5S 05 E Dimensions (unit : mm) Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 0.5Vrms@ 1MHz max Typ. 1 Resistance* R Mega Ohms (min.) 3V DC Equivalent Circuit Diagram Pad layout 3 Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering.

6 General Array AVNC Series (2_element) Features Application AVNC SERIES Two elements in one chip LCD Module 0405, 0508 Sizes I/O Port Application Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements Cellular Phone PCMCIA / Compact Flash Card ESD Protection > 30KV RS-232 & RS-423 Data Lines Low capacitance for high frequency data line protection DSP Products Fast response time < 1ns Ordering information AVNC 18 S 05 D 015 Low Capacitance Varistor array Typical 1KHz : 015 = 15pF Maximum Continuous Working - Vdc Vn Tolerance : Configuration : D = 2 element K = 10%, L = 15%, M = 20%, S = Special order Chip Size : 04 = 0405, 05 = 0508 Specifications Type Symbol Units Test Condition Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 0.5Vrms@ 1KHz 1 Resistance* R Mega Ohms (min.) 3V DC AVNC Series (0402 Dual Array) AVNC 5S 04 D AVNC 14S 04 D AVNC 18S 04 D AVNC Series (0603 Dual Array) AVNC 18S 05 D Dimensions (unit : mm) Equivalent Circuit Diagram Pad layout MAX Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering. 4

7 General Array AVNC Series (4_element) Features Application Four elements in one chip LCD Module 0508, 0612 Sizes I/O Port Application Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements Cellular Phone PCMCIA / Compact Flash Card ESD Protection > 30KV RS-232 & RS-423 Data Lines Low capacitance for high frequency data line protection DSP Products Fast response time < 1ns Ordering information AVNC 18 S 05 Q 015 Low Capacitance Varistor array Typical 1KHz : 015 = 15pF Maximum Continuous Working - Vdc Vn Tolerance : Configuration : Q= 4 element K = 10%, L = 15%, M = 20%, S = Special order Chip Size : 05 = 0508, 06 = 0612 AVNC SERIES Specifications Type Symbol Units Test Condition Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 0.5Vrms@ 1KHz 1 Resistance* R Mega Ohms (min.) 3V DC AVNC Series - (0402 Quad Array) AVNC 5S 05 Q AVNC 14S 05 Q AVNC 18S 05 Q AVNC 18S 05 Q AVNC Series - (0603 Quad Array) AVNC 18S 06 Q AVNC 14S 06 Q Dimensions (unit : mm) Equivalent Circuit Diagram Pad layout 5 Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering.

8 R-C Type EMI-ESD Filter AVRC Series Features Application Four elements in one chip 0508 sizes Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements ESD Protection > 30KV Low capacitance for high frequency data line protection Fast response time < 1ns Special Features EMI Filtering with ESD protection LCD Module Mobile Phone/PDAs MP3 Player Digital Camera ESD Protection for sensitive IC I/O Port, Keypad for portable devices Wireless Handsets Lap top computer Desk top computer AVRC SERIES Ordering information AVRC 5 S 05 Q R R-C Type EMI-ESD Filter Typical Resistance: 100R=100Ω Maximum Continuous Working - Vdc Vn Tolerance : K = 10%, L = 15%, M = 20%, S = Special order Typical 1MHz : 050= 50pF Chip Size : 05 = 0508 Configuration : Q = 4 element Specifications Type Symbol Units Test Condition Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 0.5Vrms@ 1MHz max Typ. Resistance* 1 IR Mega Ohms (min.) 3V DC AVRC 18S 05 Q R AVRC 14S 05 Q R AVRC 5S 05 Q R AVRC 5S 05 Q R Resistance R Ohms (Typ) 3V DC Dimensions (unit : mm) Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering. 6

9 R-C Type EMI-ESD Filter AVRC Series Equivalent Circuit Diagram Pad layout Frequency Charateristics AVRC 5S 05Q R AVRC SERIES AVRC 5S 05 Q R AVRC 5S 05 Q R AVRC 14S 05 Q R AVRC 18S 05 Q R Frequency vs. Insertion Loss Curve Crosstalk with port1 & port2 ESD Protection Effciency (Contact 8KV ESD Strike) ESD Curve Input (IEC Standard Waveform) ESD Curve Output 7

10 Feed Thru Type EMI-ESD Filter AVFC Series Features Application Four elements in one chip 0508 sizes Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements ESD Protection > 30KV Low capacitance for high frequency data line protection Fast response time < 1ns Special Features EMI Filtering with ESD protection LCD Module Mobile Phone/PDAs MP3 Player Digital Camera ESD Protection for sensitive IC I/O Port, Keypad for portable devices Wireless Handsets Lap top computer Desk top computer Acustic Part Ordering information AVFC 5 S 05 Q 050 AVFC SERIES Feed-thru Type EMI-ESD Filter Maximum Continuous Working - Vdc Vn Tolerance : K = 10%, L = 15%, M = 20%, S = Special order Specifications Type Symbol Units Test Condition Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Typical 1MHz : 050= 50pF Configuration : Q = 4 element Chip Size : 05 = 0508 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 0.5Vrms@ 1MHz max Typ. Resistance* 1 R Mega Ohms (min.) 3V DC AVFC 18S 05 Q AVFC 14S 05 Q AVFC 5S 05 Q AVFC 5S 05 Q Dimensions (unit : mm) Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering. 8

11 Feed Thru Type EMI-ESD Filter AVFC Series Equivalent Circuit Diagram Pad layout Frequency Charateristics AVFC 5S 05Q 050 AVFC 5S05Q100 AVFC 5S05Q050 AVFC 14S05Q030 AVFC 18S05Q010 Frequency vs. Insertion Loss Curve Crosstalk with port1 & port2 AVFC SERIES ESD Protection Effciency (Contact 8KV ESD Strike) ESD Curve Input (IEC Standard Waveform ESD Curve Output 9

12 High Power AVL Series Description AVL Series are designed to protect sensitive electronics devices against high voltage transient surges in the low voltage region. They offer excellent transient energy absorption due to improved energy volume distribution and power dissipation. AVL series cover wide DC operating voltage range from 5V to 56V. Features Multilayer construction technology Wide operating voltage range Vdc : 3V to 56V 5 Model sizes available : 0402, 0603, 1206 and 1210 ESD protection > 30KV Short response time < 1ns Bidirectional clamping and low clamping voltage - 55 to operating temperature range No plastic coating guarantees better flammability rating Low Leakage current after soldering max. 20 at Vdc Ordering information Dimensions AVL 5 M Standard Single Varistor Maximum Continuous Working - Vdc Vn Tolerance : K = 10%, L = 15%, M = 20%, S = Special order Application Mobile Phone/PDAs MP3 Player Digital Camera ESD Protection for sensitive IC I/O Port, Keypad for portable devices Wireless Handsets Lap top computer Desk top computer HDD DVD Digital TV (PDP TV, LCD TV) Maximum Surge : 200 = A Chip Size : 02 = 0402, 03 = 0603, 05 = = 1206, 10 = 1210, 25 = 3225 AVL SERIES Equivalent Circuit Diagram Pad layout Size L(mm) W(mm) M(mm) T(mm) Max 0.6 Max 0.9 Max1.1 Max

13 High Power AVL Series Specifications Type Symbol Units Test Condition Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 1MHz 1 Resistance* R Mega Ohms (min.) 3V DC Size 0402 AVL 5M AVL 8M AVL 11L AVL 14K AVL 18K Size 0603 AVL 5M AVL 8M AVL 14K AVL 18S 03 LC AV 18S 03 LC AVL 18S 03 LC AVL 18S 03 LC Size 0805 AVL 8M AVL 8M AVL 11L AVL 11L AVL 14K AVL 14K AVL 18K AVL 18K AVL 22K AVL 22K AVL 26K AVL 26K AVL SERIES Size 1206 AVL 14K AVL 18K AVL 22K AVL 26K AVL 31K AVL 38K AVL 45K AVL 56K Customized properties are available upon request. Resistance after soldering is 10Mmin. [Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering.

14 Low Capacitance AVLC Series Features Meets IEC (ESD), Level 4 & IEC (EFT), Level 4 requirements ESD Protection > 30 KV Low capacitance for high frequency data line protection Small size {0402 (1.00.5mm), 0603 (1.60.8mm) } Fast response time < 1ns Available in tape and reel for automatic pick and place Ordering information Application Mobile Phone & PDA Cellular Phone PCMCIA / Compact Flash Card RS-232 & RS-423 Data Lines USB Data Lines MCM Boards LCD Module AVLC 5 S Low Capacitance Single Varistor Maximum Continuous Working - Vdc Vn Tolerance : K = 10%, L = 15%, M = 20%, S = Special order Typical 1KHz : 050 = 50pF Chip Size : 02 = 0402, 03 = 0603 Specifications Type Symbol Units Test Condition Working Vdc < 20 Breakdown Vn Volts 1mA DC Vc Ic Amp 8/20 Peak Imax Amp(max.) 8/20 Transient Energy Wmax Joules(max.) 10/1000 Capacitance C pf(typ.) 1MHz 1 Resistance* R Mega Ohms (min.) 3V DC AVLC 5S AVLC 5S AVLC 14S AVLC 14S AVLC 18S AVLC 18S AVLC 18S Dimensions AVLC SERIES Equivalent Circuit Diagram Pad layout Resistance after soldering is 10Mmin.[Reflow soldering condition] Temperature profile : 230 max., 5sec Solder paste : Tamura (Japan) RMA L, Measurement shall be made 1 hour after soldering. 12

15 TERMINOLOGY Term Rated AC Rated DC Supply Leakage Varistor voltage Reference Protection Level Ratio Class Rated Single Pulse Transient Energy Rated Peak Single Pulse Transient Rated Transient Average Power Dissipation Capacitance Nonlinear Exponent Response Time Varistor voltage Temperature Coefficient Insulation Resistance Isolaion Operating Temperature Climatic Category Storage Temperature Energy Derating Symbol Vrms Vdc V Id Vn In Vc Vc/Vapp Ic Wmax Imax P C LCT/UCT/DHD Maximum continuous sinusoidal RMS voltage (<5% total harmonic distortion) which may be applied to the component under continuous operating conditions at 25 Maximum continuous DC voltage (<5% ripple) which may be applied to the component under continuous operating conditions at 25 The voltage by which the system is designated and to which certain operating characteristics of the system are referred; normally Vrms=1.1V The current passing through the varistor at Vdc and at 25 across the varistor measured at a given reference current In Reference current The peak voltage developed across the varistor under standard atmospheric conditions when passing an 8/20 class current pulse A figure of merit measure of the varistor clamping effectiveness as defined by the symbols Vc/Vapp, where (Vapp=Vrms or Vdc) A peak value of current which is 1/10 of the maximum peak current for 100 pulses at two per minute for the 8/20 s pulse Energy which may be dissipated for a single 10/1000 impulse of a maximum rated current, with rated RMS voltage or rated DC voltage also applied without causing device failure Maximum peak current which may be applied for a single 8/20 impulse, with rated line voltage also applied, without causing device failure Maximum average which may be dissipated due to a group of pulses occurring within a specified isolated time period, without causing device failure at 25 Capacitance between two terminals of the varistor measured at 1 khz A measure of varistor nonlinearity between two given operating currents, In and I2, as described by I = kvexp() where k is a device constant, I2IIn, and a I2 = log (I1/In)/log (V1/Vn) = 1/log (V1/Vn), where: In- reference current (1mA, or 0.1mA), Vn-varistor voltage, I1=10In, V1- the voltage measured at I1 The time lag between application of a surge and varistor s turn-on conduction action (Vn at 85-Vn at 25)/((Vn at 25) 60) 100 Minimum resistance between shorted terminals and varistor surface Minimum voltage applied for one minute between shorted terminals and varistor surface The range of ambient temperature for which the varistor is designed to operate continuously, as defined by the temperature limits of its climatic category UCT=Upper Category Temperature, LCT=Lower Category Temperature, DHD=Dump Heat Test Duration Storage temperature range without voltage applied Derating of maximum values when operated above 85 13

16 SELECTION GUIDELINES & APPLICATION FIELDS The selection of Transient Suppressors involves comparison of device parameter with circuit conditions. The following selection guidelines are recommended: 1. Select Transient Suppressors with a rated voltage greater than or equal to the normal operating voltage of the circuit. 2. Select Transient Suppressors which is capable of dissipating the expected transient peak pulse current. 3. The Transient Suppressors clamping voltage should be less than the maximum voltage handling capability of the protected circuit for the same pulse waveform. 4. For systems using high speed data rates, Transient Suppressors capacitance will have to be considered. There may be applications where the actual transient current cannot be defined. Often, the designer will have to meet the requirements of certain transient immunity specification. As the very least, identification of the source of the threat is necessary; lightning, inductive switching, ESD, etc. Summary of Selection Device Parameter Circuit Condition Vdc (V) 120% of Normal circuit operating voltage Imax (A) Expected transient current Vc (V) Maximum allowable voltage across the protected component C Maximum loading capacitance for signal integrity Market Communication Computer & Consumer Car Electronics Peripheral Product Application Cellular/ cordless phone LCD display Programming port Charger Key pads Speaker &Microphone ASIC protection Laser diode protection FETs protection Secondary phone line Data line connection Line card Fax machine Personal computer Audio card Keyboards I/O ports RS232/RS422/IEEE 488 Interface card Printer & Scanner Paper feeders Key pads Opto sensors Hard disc drive Vcc protection FAX / MODEM Note book computer Security system Sensor protection Key pads Microprocessor reset & I/O protection LCD display CATV LNA FETs protection Logic box protection Portable equipment Camcorder Cassette player CD player MD player Digital camera PDAs ECU protection Multiplex I/O line ABS system Airbag system Audio system Navigation system Smart sensor & actuator Ignition circuit LCD display Audio card Keyboard I/O ports Charger PCMCIA cards Motor control boards 14

17 TAPE AND REEL SPECIFICATION & SOLDERING RECOMMENDATION Conforms to IEC Publication SIZE 0402 SIZE 0603 ~ 3225 Size Units A 0 (mm) B 0 (mm) C (mm) D (mm) E (mm) K (mm) W (mm) Units/Reel pcs 10,000 4,000 4,000 3,500 3,500 1,500 Sn/Pb Solder paste Pb free Solder paste Repair soldering Allowable time and temperature for making correction with a soldering iron :35010 C, 3 sec. Optimum solder amount when corrections are made using a soldering iron Soldering Guidelines Our chip varistors are designed for reflow soldering only. Do not use flow soldering Use Sn/Pb/Ag(62/36/2) or equivalent solder. Use non-activated flux(cl content 0.2% max.) Follow the recommended soldering conditions to avoid varistor damage Storage Recommendation 15 The components should be used within 6 months. They are to be left in the original package in order to avoid soldering problems caused by oxidized terminals. Air humidity should be less than 40%.

18 Transient Suppressors Applications TYPICAL CIRCUITS REQUIRING PROTECTION Mobile Phone Protection Speaker Jack protection Power Supply protection Button protection Data Interface protection Key Pad LED protection USB Interface protection Antenna Switching Module protection Batterry Protected Circuit Module protection Speaker Jack Protection in LCD Module LCD Data Line & Module protection Notebook & Desktop Computer Protection LCD protection Audio circuit protection Keyboard protection I/O port protection Semiconductor Device Protection ASIC protection IC protection MOSFET protection Micro Controllers Relays, DC motors Protection CMOS relay driver LM319 relay driver Sensor Protection Typical sensor protection Hall device protection Preamplifier Protection Optic Protection

19 Mobile Phone Protection Speaker jack Protection Required characteristics of ESD Suppressors Power Supply Protection Required characteristics of ESD Suppressors Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Concern on many designs Rated DC Volt. : < 5V Energy rating : < 0.05J Capacitance : No Concern Button Protection Required characteristics of ESD Suppressors Data interface Protection Required characteristics of ESD Suppressors Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Concern on many designs Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Should be minimized 17

20 Key Pad LED Protection Required characteristics of ESD Suppressors USB Interface Protection Required characteristics of ESD Suppressors Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Concern on many designs Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Depend on data transmission rate Antenna Switching Module Protection Module Protection Required characteristics of ESD Suppressors Required characteristics of ESD Suppressors Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Should be minimized Rated DC Volt. : < 18V Energy rating : < 0.1J Capacitance : No Concern 18

21 Speaker Protection in LCD Module Required characteristics of ESD Suppressors Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Concern on many designs LCD data line & Module Protection Required characteristics of ESD Suppressors Rated DC Volt. : < 18V Energy rating : < 0.05J Capacitance : Should be minimized 19

22 Notebook & Desktop Computer Protection LCD Protection Required characteristics of Transient Suppressors Audio Circuit Protection Required characteristics of Transient Suppressors Rated DC Volt. : < 5.6V Energy rating : < 0.1J Capacitance : Preferred to be minimum Rated DC Volt. : 14V - 18V Energy rating : Typically 0.1J Capacitance : No concern Keyboard Protection I/O Port Protection Required characteristics of Transient Suppressors Required characteristics of Transient Suppressors Rated DC Volt. : > 5.6V Energy rating : < 0.4J Capacitance : Preferred to be minimum Rated DC Volt. : 14V - 18V Energy rating : Typically 0.05J - 0.1J Capacitance : Should be minimized 20

23 Semiconductor Device Protection ASIC Protection IC Protection MOSFET Protection Micro Controllers Relays CMOS Relay Drivers LM319 Relay Driver Required characteristics of Transient Suppressors Rated DC Volt. : Relay voltage Energy rating : Typically > 0.3J Capacitance : No concern Required characteristics of Transient Suppressors Rated DC Volt. : Relay voltage Energy rating : Typically > 0.3J Capacitance : No concern 21

24 Sensor Protection Typical Sensor Protection Required characteristics of Transient Suppressors Rated DC Volt. :Typically > 14V Energy rating : Typically > 0.4J Capacitance : No concern Hall Device Protection Required characteristics of Transient Suppressors Rated DC Volt. : Control voltage Energy rating : Typically > 0.3J Capacitance : No concern Preamplifier/Optics Protection Preamplifier Protection Laser Diode Protection Required characteristics of Transient Suppressors Required characteristics of Transient Suppressors Rated DC Volt. :Typically 18V - 26V Energy rating : 0.05J - 0.9J Capacitance : Concern on many designs Rated DC Volt. : 18V Energy rating : 0.1J Capacitance : Should be minimized 22